Is x greater than 3?

Hi sfoo . the answer is "by speed drawing"

follow these steps:
step 1 : find key points of the equation
in our case, the equation is \(x(x-3)(x+3)\) > \(0\)
so the points are 0,3,-3

step 2: draw them on a straight light in ascending order
so you will have : -----------------------(-3)------------(0)----------(3)-------------

step 3: draw a parabolic line "like an "S" (wavy line starting with the biggest number, starting from the positive side (because x has positive sign beside it))

step 4: since the inequality is asking for intervals > 0, so we take the intervals above the straight line.

note: beware of the inequalities whether it is > or >=

try plugging in different equations in this plot to get sense of how things work: https://fooplot.com/#W3sidHlwZSI6MCwiZXEiOiJ4XjIiLCJjb2xvciI6IiMwMDAwMDAifSx7InR5cGUiOjEwMDB9XQ--